Gzig,
Sadly you are not getting it.....& it is pretty simple. For the second [ or third? ] time, when you remove material from an object, you weaken it. The bush in this instance will do NOTHING to compensate for the loss of strength caused by metal removal. The wrap-around area under the shaft is very heavily loaded & rockers that break often break THERE.......and that is where you are weakening the rocker to install a bush.
